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PORTAIL D'INFORMATION GÉOGRAPHIQUE

High rates of erosion and rapid weathering in a Plio-Pleistocene mudstone badland, Taiwan

Updating badlands research

Auteur(s) et Affiliation(s)

HIGUCHI, K.
Disaster Prevention Research Inst., Univ., Kyoto, Japon
CHIRIGA, M.
Disaster Prevention Research Inst., Univ., Kyoto, Japon
LEE, D.-H.
Dept. of Civil Engineering, National Cheng Kung Univ., Tainan, Taiwan, Province de Chine
Dept. of Geography, Univ., Zaragoza, Espagne
YAIR, A.
Hebrew Univ., Jerusalem, Israel


Description :
The badlands of southwest Taiwan are characterized by sharp ridges, and are located in a tropical monsoon area that experiences contrasting rainy and dry seasons. Surface erosion predominates and subsurface erosion by piping is rather limited to accumulation of mud in valley bottoms. Erosion rates on Plio-Pleistocene mudstone slopes, measured using erosion pins over a period of 4 years, averaged up to 9 cm/y in rainy seasons, which is considerably faster than the rates of a few cm/y typical in arid or semi-arid areas. Mudstone is deteriorated and saline materials are concentrated near slope surfaces. It is highlighted that the deteriorated surface layers are removed by rainfall in rainy seasons.


Type de document :
Article de monographie

Source :
Catena (Giessen), issn : 0341-8162, 2013, vol. 106, p. 68-82, nombre de pages : 15, Références bibliographiques : 30 ref.

Date :
2013

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena

Langue :
Anglais
Droits :
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